FISHERY BULLETIN: VOL. 84, NO. 2 



spines, these spines becoming much larger at both 

 corners. 



Mandible (Fig. Ik).— Simple form, small, about 42 

 (im long, with expanded base but slender distal por- 

 tion bearing 2 minute setae midway and having 

 minutely pectinate tip. 



Paragnath — Minute smooth lobe. 



First maxilla (Fig. 11).— Small lobe bearing 6 setae 



Second maxilla (Fig. lm).— Two-segmented, large 

 first segment with 2 setae, small second segment 

 with 3 setae 



Maxilliped (Fig. In).— Elongate, slender, 4-seg- 

 mented. First segment with 2 setae Elongate second 

 segment with 2 setae and 2 small setules. Small third 

 segment with 1 long seta having few prominent 

 lateral setules. Fourth segment bearing 3 setae near 

 midregion and extended beyond as setiform process 

 with few minute barbs near tip. 



Leg 1 (Fig. 2a).— Both rami 1-segmented. Formula 

 for armature: coxa 0-0; basis 1-0; exopod 111,1,4; endo- 

 pod 1,5,1. Exopod with 3 outer spines having prom- 

 inent lateral spinules and terminal outer spine and 

 adjacent seta with outer denticulations. 



Leg 2 (Fig. 2b).— Both rami 1-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 111,1,3; endopod 

 111,2,1. Exopod spines with lateral spinules or den- 

 ticulations as in leg 1; endopod spines finely barbed. 



Leg 3 (Fig. 2c).— Consisting of 2 setae 70 and 57 

 ^m, with 2 very small spines near their insertions. 



Legs 4, 5, and 6— Absent. 



Copepodid II 



Figures 2d-m, 3a-e 



Size-Length 0.68 mm (0.59-0.72 mm) and 

 greatest width 0.19 mm (0.18-0.20 mm), based on 31 

 specimens. 



Body form (Fig. 2d).— No longer Saphirella-Wke. 

 Suggesting form of later instars. Six body segments 

 including and posterior to segment bearing leg 1. 

 Segment bearing leg 4 ventrally with 2 transverse 

 rows of spines (Fig. 2e). Anal segment ventrally with 

 distal spines in addition to 4 groups of proximal 



spines. Ventrolateral areas of cephalosome at level 

 of mouthparts with strip of small spinules (Fig. 3a). 



Caudal ramus.— Similar to Copepodid I but few 

 small ventral spines distally 



Rostrum (Fig. 2f).— Suggesting rounded form seen 

 in later instars. 



First antenna (Fig. 2g).— Five-segmented, 107 /urn 

 long. Armature: 2, 3, 3 + 1 aesthete 2 + 1 aesthete, 

 and 6 + 1 aesthete 



Second antenna (Fig. 2h).— Four-segmented. Third 

 segment with 2 strong recurved outer clawlike 

 spines. Small fourth segment with 4 smooth setae 



2 middle setae curved. 



Labrum (Fig. 2i).— Posteroventral margin sharply 

 pointed. No surficial or marginal ornamentation. 



Mandible (Fig. 2j).— Elongate 43 ^m, distally with 



3 elements, 2 helmet-shaped and 1 stoutly spiniform, 

 all with minute marginal barbs. 



Paragnath.— As an adult (see Fig. 7f). 



First maxilla (Fig. 2k).— Small lobe bearing 5 setae 



Second maxilla (Fig. 21).— Two-segmented, its form 

 suggesting later instars. First segment expanded 

 with outer patch of small spines. Second segment 

 clawlike 30 ^m long, with 1 inner seta. 



Maxilliped (Fig. 2m).— Delicately sclerotized and 

 weakly 4-segmented, length 40 ^m. Relative posi- 

 tions of maxillipeds and head appendages as in Fig- 

 ure 3a. 



Leg 1 (Fig. 3b).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-1; exopod 1-0; 111,5; endopod 

 0-1; 1,5. 



Leg 2 (Fig. 3c).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 1-0; 111,4; endopod 

 0-1; 111,3. 



Leg 3 (Fig. 3d).— Both rami 1-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 111,4; endopod 111,3. 



Leg 4 (Fig. 3e).— Consisting of 2 setae 52 and 39 

 fim. 



Legs 5 and 6.— Absent. 



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